Lawn-mower.



PATENTED FEB. 21, 1905.

A. LAKE. LAWN MOWER.

APPLICATION FILED JULY 19. 1904.

2 SHEETS-SHEET 1.

No. 783,052. PATENTED FEB. 21, 1905.

A. LAKE. LAWN MOWER.

APPLICATION FILED JULY 19, 1904.

2 SHEETS-SHEET 2.

WWSQS. [Iv 612501."

fiffifi M UNITED STATES Patented February 21, 1905.

PATENT OFFICE.

LAWN-MOWER.

SPECIFICATION forming part of Letters Patent No. 783,052, dated February21, 1905. Application filed Tuly 19, 1904. Serial No. 217,155.

To a whont it may concern:

Be it known that I, AROHIBALD LAKE, of the city of Galt, county ofWaterloo, and Province of Ontario, Canada, have invented certain new anduseful Improvements in Lawn-Mowers; and I hereby declare that thefollowing is a full, clear, and exact description of .the same.

This invention relates to a lawn-mower in which the cylinder or rotaryknife is driven by an intermediate gear from a single drivewheel locatedat one end of the stationary knife-bar, the object of this inventionbeing to so construct and arrange the various parts of the mower that itcan be employed not only for cutting the surface of the lawn, but alsofor trimming its edges or borders.

For a full-understanding of the invention reference is to be had to thefollowing description and to the accompanying drawings, in which- Figurel is a perspective view of the lawnmower with the handle broken away.Fig. 2 is a longitudinal section through the same. Fig. 3 is aperspective View of the drivinggear for the cylinder or rotary knife.Fig. 4 is a perspective view of the outer end of the knife-bar,ground-Wheel, and supports therefor. Fig. 5 is an end view of thelawn-mower with the drive-wheel removed and the casing for thedriving-gear broken away, and Fig: 6 is a similar view from the oppositeend with the ground-wheel removed.

Like letters of reference refer to like parts throughout thespecification and drawings.

At the ends of the knife-bar a are vertical arms 6 b, and to the undersurface of the knife-bar a is fastened the stationary knife g. Thevertical arm 6 at one end of the knifebar a terminates in a gear-caseit, having a bearing 2' alining with a bearing c" at the upper end ofthe vertical arm b, and'mounted in the bearings 2' and 2/" is astationary shaft j, upon which is loosely mounted between the bearings2' and c" the sleeve or hub is of the cylinder-arms Z, to which areconnected the blades f; and to reduce the friction of the revolution ofthe sleeve or hub It around the stationary shaft j antifriction-bearingsmay be interposed between the shaft and the inner surface of the hub.Mounted upon the sleeve or hub A: is a pinion m, which meshes with thegear-wheel 0, contained within the gear-case it. The stud or shaft 9 ofthe gear-wheel 0 projects beyond the bearings to receive thedriving-pinion g, which meshes with the gearwheelr, connected to thedriving-wheel s. The driving-wheel is loosely mounted upon thestationary shaft 1', projecting beyond the outer side of the gear-casel6, and during the forward movement of the lawn-mower the gearwheel 1'revolving with the drive-wheel 8 causes the revolution of thedrive-pinion g, which imparts a rotary motion through the stud or shaftto the gear-wheel 0. The revolution of the gear-wheel 0 causes therevolution of the pinion m and the sleeve or hub k of the cylinder orrotary knife, the blades of which during their revolution pass acrossthe cutting edge of the stationary knife 9.

To support the outer end of the lawn-mower and to guard the ends of thecylinder or knifeblades, 2. ground-wheel g is loosely mounted upon astud g, projecting from the outer face of the vertical arm I) betweenthe bearing c" and its connection with the adjacent end of theknife-bar. This ground-wheel has no other function to perform than thatof supporting the outer end of the cylinder and guarding the knives, andconsequently the operator can during the progress of the lawn-mowerthrow the weight of the cylinder upon the drivewheel by raising theground-wheel from the sod without straining the load upon the handle orimpairing the driving qualities of the driving-gear. This is ofparticular advantage when trimming the edge of a walk, border, ordriveway, when no surface is presented for the ground-wheel to travelupon. To support the outer end of the cylinder when projecting beyondsuch an edge, I find it advisable to detachably connect to the knife-barbetweenthe middle and outer end an inturned arm 0;, to the free end ofwhich is fastened a follower-wheel w to follow along in rear of theknife-bar between the gear-case and the middle of the 9 knife-bar. Thearm 01 is of sufficient strength and rigidity to sustain the entireweight of the lawn-mower, and by using the followerwheel it is possibleto allow over one-half of the cylinder or rotary knife to project beyondToo the edge or border during the progress of the machine.

To propel the machine, the outer surface of the gear-case is embraced bya substantially semicircular-shaped divided strap in, having elongatedslots 7 through which pass the fastening-bolts to enter thescrew-threaded boltapcrtures in the adjacent surface of the gearcase.The adjacent ends of the strap in are outturned to form two projectingarms 0, between which is bolted thehandle (Z. By means of the bolts andslots fl/ the angle of the handle (6 to the knife-bar can be varied, andby making the lawn-mower in the manner outlined above it is possible todispense with the usual wooden roller, to reduce the weight of themachine, and to enable the operator to easilymanipulate it either whencutting with both wheels on a level surface or with one wheel removedtherefrom.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

I 1. In a lawn-mower the combination of the knife-bar,vertically-disposed arms rigidly connected to the knife-bar, bearingsconnected to the arms, a shaft journaled in the bearings having one endprojecting beyond the adjacent arm, a rotary knife the hub of whichismounted upon the shaft between the vertically-disposed arms, adrive-wheel mounted upon the projecting end of the shaft, a gear-wheelrotatable with the drive-wheel, a second gearwheel the shaft of which isjournaled in a bearing supported by the adjacent arm, a pinion mountedupon the gear-wheel shaft meshing with the gear-wheel rotated by thedrivewheel and a pinion mounted upon the hub of the rotary knife meshingwith the second-mentioned gear-wheel.

2. In a lawn-mower the combination of the knife-bar, vertically-disposedarms rigidly connected to the knife-bar bearings connected to the arms,a shaft journaled in the bearings having one end projecting beyond theadjacent arm, a rotary knife the hub of which is mounted upon the shaftbetween the vertically-disposed arms, a drive-wheel mounted upon theprojecting end of the shaft, a gearwheel rotatable with the drive-wheel,a second gear-wheel the shaft of which is journaled in a bearingsupported by the adjacent arm, a pinion mounted upon the gear-wheelshaft meshing with the gear-wheel rotated by the drive-wheel, a pinionmounted upon the hub of the rotary knife meshing with thesecond-mentioned gear-wheel, a ground-wheel at the opposite end of theknife-bar to the drivewheel and a stud projecting from the adjacent armupon which the ground-wheel is mounted.

3. In a lawn-mower the combination of the knife-bar, vertically-disiiosed arms rigidly connected to the knife-bar bearings connected to thearms, a shaft journaled in the bearings having one end projecting beyondthe adjacent arm, a rotary knife the hub of which is mounted upon theshaft between the vertically-disposed arms, a drive-wheel mounted uponthe projecting end of the shaft, a gear-wheel rotatable with thedrive-wheel, a second gearwheel the shaft of which is journaled in abearing supported by the adjacent arm, a pinion mounted upon thegearwheel shaft meshing with the gear-wheel rotated by the drive-wheel,a pinion mounted upon the hub of the rotary knife meshing with thesecondmentioned gear-wheel, an arm detachably connected to andprojecting from the rear of the knife-bar and a follower-wheel carriedby the arm.

4:. In a lawn-mower the combination of theknife-bar,outwardly-projecting arms connected to the knife-bar, bearingsconnected to the arms, a shaft journaled in the bearings having one endprojecting beyond the adjacent arm, a gear-case supported by the last- Amentioned arm, a gear-wheel contained therein having a stud projectingbeyond the outer face of the gear-case, a pinion mounted upon the stud adrive-wheel mounted upon the projecting end of the shaft, a gear-wheelmeshing with the pinion and rotatable with the drive-wheel, a rotaryknife the hub of which is mounted upon the shaft between theoutwardly-projecting arms, a pinion for the hub meshing with thefirst-mentioned gear-wheel, a handle-bar having a strap to embrace thegear-case with elongated slots in its opposite ends and set-screwspassing through the elongated slots into the gear-case to adjustablyconnect the handle-bar thereto.

5. In a lawn-mower the combination of the knife-bar,outwardly-projecting arms connected to the knife-bar, bearings connectedto the arms, a shaft journaled in the bearings having one end projectingbeyond the adjacent arm, a gear-case supported by the last-mentionedarm, a gear-wheel contained therein having a stud projecting beyond theouter face of the gear-case, a pinion mounted upon the stud, adrive-wheel mounted upon the projecting end of the shaft, a gear-wheelmesh: ing with the pinion and rotatable with the drive-wheel, a rotaryknife the hub of which is mounted upon the shaft between the outwardly-projecting arms, a pinion for the hub meshing with thefirst-mentioned gear-wheel, a handle-bar having a strap to embrace thegear-case with elongated slots in its opposite ends,setscrews passingthrough the elongated slots into the gear-case to adjustably connect thehandle-bar thereto, a ground-wheel at the opposite end of the knife-barto the drivewheel, and a stud projecting from the adjacent arm uponwhich the ground-wheel is mounted.

6. In a lawn-mower the combination of the knife-bar,outwardly-projectingarms connected to the knife-bar, bearings connected to the arms, a shaftjournaled in the bearings having one end projecting beyond the adjacentarm, a gear-case supported by the last-mentioned arm, a gear-wheelcontained therein having a stud projecting beyond the outer face of thegear-case, a pinion mounted upon the stud, a drive-wheel mounted uponthe projecting end of the shaft, a gear-wheel meshing with the pinionand rotatable with the drivewheel, a rotary knife the hub of which ismounted upon the shaft between the outwardly-projecting arms, a pinionfor the hub meshing with the first-mentioned gear-wheel,

a handle-bar having a strap to embrace the gear-case with elongatedslots in its opposite ends,set-screws passing through the elongatedslots into the gear-case to adjustably connect the handle-bar thereto, aground-wheel at the opposite end of the knife-bar to the drive- Wheel, astud projecting from the adjacent arm upon which the ground-wheel ismounted, an arm detachably connected to and projecting from the rear ofthe knife-bar and a follower-wheel carried by the arm.

Toronto, June 22, 1904.

AROHIBALD LAKE.

In presence of C. H. RICHES,

L. F. BROOK.

